Hydrocarbon-motor



L. K. SNELL. HYDROCARBON MOTOR. APPLICATION FILED DEC-1,1916.

Patented June 8, 1920.

INVENTOR I I w JIVElL ,4 TTORA/EY UNITED STATES PATENT OFFICE.

LYLE K. SNELL, OF DETROIT, MICHIGAN, ASSIGNOR T0 CADILLAC MOTOR CARCOMPANY, OF DETROIT, MICHIGAN, A CORPORATION OF MICHIGAN.

HYDROCARBON-MOTOR.

Specification of Letters Patent.

Patented June 8, 1920.

Application filed December 1, 1916. Serial No. 134,513.

To all whom it may concern p Be it known that I, LYLE K. SNELL, acitizen of the United States, and resident of Detroit, \Vayne county.State of Michigan, have invented certain new and useful 1m: provementsin Hydrocarbon Motors, of which the following is a specification.

This invention relates to hydrocarbon motors, and particularly tocarbureting or fuelmixing devices therefor.

()ne of the objects of this invention is to provide simple and eflicientmeans for maintaining a pre-determined level of fuel in a carbureterwithout the disadvantages associated with theuse of float valves. 1

Another object of this invention is to provide a sealed level regulatingchamber with means for the prevention of blowing fuel. from the chamberwhen the carbureter pops back. 1

Another object of this invention is to provide a more sensitivelevel-regulating device for a carbureter; my preferred form being shownand described as affected by the combined action of a resilient member(such as a spring) and the relation of atmospheric pressure to thestatic pressure of the head of fuel within the nozzle of the carbureter.

These, and other objects, will appear from the following description.taken in connection with the drawings which form a part of thisspecification, and in which Figure 1 illustrates a more or lessdiagrammatic view of a hydrocarbon motor power plant embodying a form ofthis in vention;

Fig. 2 is a vertical sectional view of the carbureter illustrated inFig. 1; and Fig. 3 is a modified form of the valve Referring to thedrawings, 10 illustrates one of a pair of frame side members upon whicha hydrocarbon motor 11 of any wellknown form, and a fuel tank 12,respectively, may be mounted. An air pump 13 may be mounted and suitablydriven at the. front end of the motor 11. A conduit 14: is adapted to.communicate the pressure generated within the pump 13 to the fuel supplysource 12. Another conduit 15 is'adapted to feed the fuel from the tank12 to the carbureter 16 through a regulating device which will be moreparticularly referred to hereinafter.

The carbureter 16 is adapted to be connected with the motor intake 17through flanges 18 and eonnecting bolts 19. The carbureter isillustrated as comprising a fuel nozzle 20, primary air ports 21, and ase'condary air port 22. The latter port is adapted to be automaticallycontrolled by a valve 23 pivotally mounted as at 2-1, and yield inglyclosed by a spring 25. The usual throttle valve is illustrated at 26.

The prcssure-regulating device, comprises a stationary lower end wall27, a relatively movable upper end wall 28, and an inherently resilientand flexible corrugated side wall 29 of tubular form. The lower andupper ends of the side wall 29 may be secured to the upper and lower endwalls, re spectively, as by clamping the tubular wall at 30 and 31,respectively. The wall 27 has a port 32 formed therein and adapted tocommunicate with the interior of the fuelfeed conduit 15. The end wall27 also is provided with another port 33, in which may be threaded astand pipe 34 whose upper end is in conununication with the interior 35of the regulating chamber. The lower end of the stand pipe is inconstant communication with the interior of the fuel noz-.

4A), with a rod 41 adjustably mounted as by threads 42 in the diaphragmupper end wall 28. lock nut 43 maintains the rod 41 and connected partsin adjusted relation.

With the construction and arrangement of parts described. the operationof my invention will be understood as follows:

Meanssuc-h as the pump 13 will provide sufficient lifting action tocause the fuel to flow from the tank 12 to the interior 35 of theregulating chamber. Prior to the entrance of fuel into this chamber, thecorrugated wall 29 will be slightly contracted axially. The fuel willrise in level until the chamber is completely filled, when further flowof fuel through the port 32 will raise the movable end wall 28, thusexpanding axially the resilient tubular wall 29 until the valve member37 is brought against its seat and'clos'ing off the communication of theinterior of the chamber 35 with the conduit 15. It will of course beunderstood that as the level of the fuel in the chamber 35 was raised,any air therein would be discharged through the port 34 of the standpipe to the fuel nozzle 20, thus preventing the creation of an airpocket in the regulating chamber. 1

y The valve mechanism is so adjusted that when there is sufficient fuelin the chamber 35 to seat the valve member 37 the level of the fuel inthe nozzle 20 will be also maintained at a proper height. Of course ofpressure. in the chamber which will automatically close off itscommunication with the source of fuel supply. It will be also understoodthat in addl- -tionto the inherent resilience of the very sensitivetubular corrugated wall 29, the action of the regulating chamber isaffected through the diaphragm 28 by the relation of atmosphericpressure to'the static pressure of the fuel within the chamber35. In

other words, as the level of the fuel within the chamber 35 decreased,atmospheric pressure tends, in an increasing degree, to move the endwall 28 toward the opposite wall 27 on account of the changing relationof the internal and atmospheric pressures. Thus, I am enabled to use avery light and sensitive spring action in the wall 29.

Referring more particularly to Fig. 3, it Will be, noted that instead ofclosing the valve member 37 through the action of the end wall'28, asprin 44 is adapted to perform this function. he valve member 37 isprovided with a ball 45 which merely rests against the lower end 46 ofthe member 39. In this form, the diaphragm positively opens the valve ona downward movement thereof, and permits the spring 44 to close thevalveon an upward movement thereof.

While I have described and will specifically claim what I deem to bepreferred em 'bodiments of my invention, it will be obvious to thoseskilled in the art that Va adaptations,

rious changes, modifications, and uses may be made Without departingfrom the spirit and scope hereof.

Having thus described my invention, what I claim and desire to secure byLetters Patent is:

1. A carbureter comprising a mixing chamber, a fluid fuel chamber havinga stand pipe therein, means for supplying fuel to said mixing chamberfrom said fuel chamber, and means controlled by the pressure about theexterior wall of said fuel chamber for regulating to a constant pressurethe flow of fuel to said mixing chamber from said fuel chamber throughsaid stand pipe.

through, and an expansible fuel vessel oper-' atively connected withsaid valve mechanism and having a stand pipe therein through. which fuelflows to said mixing chamber. a

4. A carbureter comprising a mixing chamber, a nozzle arranged in saidmixing chamber and connected to a supply pipe havin a valve mechanismconnected therewith for regulating the flow of fuel therethrough, anexpansible fuel vessel operatively connected with said valve mechanism,and a stand pipe arranged in said fuel vessel and supplying-fuel at aconstant level to said nozzle.

5. A carbureter comprising a mixing chamber, a nozzle within said mixingchamber and "connected to a supply pipe having valve mechanism connectedtherewith for regulating the flow of fuel therethrough; a

fuel supply vessel having a ported stationary end wall and movable endwall, said walls being connected by a flexible corru gated .tubularwalland having a stand pipe therein through which fuel flows to saidmixing chamber,'a valve member adjacent said stationary wall, and auniversal connection-between said movable wall and said valve member,said movable wall being unconnected with any other movable parts,whereby it may have free lateral movement.

6. A carbureter having a fuel nozzle, a collapsible fuel supply vesselhaving asta- 2. A carbureter comprising a mixing tionary end wall, amovable end wall, and a corrugated tubular side wall, said vessel havinga valve mechanism and a port in copstant'communication with the interiorof said nozzle, and a connection between said movable end wall and saidvalve mechanism, whereby a rise in the level of the fuel in said nozzle,above the normal, will cause an upward movement of said latter mentionedwall, to close said valve mechanism.

7. A carbureter having a fuel nozzle, and .a source of supply therefor,means connecting said source and said nozzle comprising afuel levelregulator, said regulator comprising a chamber sealed againstcommunication with the atmosphere and having ports connected with saidnozzle and said source, respectively and a stand pipe in said chamberthrough which fuel flows to the port.

connected to said nozzle.

8. In a carburetena nozzle and means fo maintaining a predeterminedlevel of fuel

